Hello, I’m Marilina Kontogiannatou, a dynamic professional blending AI training, data annotation, and linguistic analysis with a strong background in international administration and financial services. I optimize Large Language Models through prompt engineering, quality evaluation, and meticulous linguistic review to ensure native-level accuracy in Greek content, transcription, and translation. I thrive in freelance and remote environments, collaborating on Greek-language AI projects and data workflows. With a proactive approach and clear communication, I bridge the gap between technical and business teams to deliver reliable, high-quality results.

Marilina Kontogiannatou

Hello, I’m Marilina Kontogiannatou, a dynamic professional blending AI training, data annotation, and linguistic analysis with a strong background in international administration and financial services. I optimize Large Language Models through prompt engineering, quality evaluation, and meticulous linguistic review to ensure native-level accuracy in Greek content, transcription, and translation. I thrive in freelance and remote environments, collaborating on Greek-language AI projects and data workflows. With a proactive approach and clear communication, I bridge the gap between technical and business teams to deliver reliable, high-quality results.

Available to hire

Hello, I’m Marilina Kontogiannatou, a dynamic professional blending AI training, data annotation, and linguistic analysis with a strong background in international administration and financial services. I optimize Large Language Models through prompt engineering, quality evaluation, and meticulous linguistic review to ensure native-level accuracy in Greek content, transcription, and translation.

I thrive in freelance and remote environments, collaborating on Greek-language AI projects and data workflows. With a proactive approach and clear communication, I bridge the gap between technical and business teams to deliver reliable, high-quality results.

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Language

Greek, Modern
Fluent
English
Advanced
German
Beginner

Work Experience

Administration Clerk / Front Desk at ACS Courier and Postal Services
October 1, 2020 - November 1, 2023
Managed front-of-house operations, customer service, and general administrative workflows to ensure smooth daily operations and accurate documentation.
Invoice to Pay Analyst at Pfizer Inc.
February 1, 2019 - April 1, 2020
Processed high-volume invoices and regulated payment runs and financial reports in a global corporate environment; coordinated cost allocation and provided internal customer service.
Secretary at Exterior Garden Designs
February 1, 2014 - January 1, 2017
Oversaw invoicing, client bookings, and management of local marketing strategies.
Service & Development Assistant (Internship) at ATEbank of Greece
October 1, 2011 - April 1, 2012
Assisted with opening savings accounts, filing, and retail customer service; specialized in audio annotation and transcription for high-volume YouTube podcasts.
Greek Language Specialist at Perle
January 1, 2026 - Present
Providing high-level linguistic support for Grok and X. Executing complex transcription, translation, and proofreading tasks to ensure native-level accuracy.
Data Annotator (Greek Language) at Arohana Tech
November 1, 2025 - January 1, 2026
AI data labeling for Greek language; performed annotation tasks and quality checks.
AI Chatbot Tasker & Coordinator at Remotasks & Outlier
November 1, 2023 - July 1, 2024
Contributed to the development of Gemini, Google, and other LLM projects in Greek; applied prompt engineering to train, rate, and rewrite machine-learning responses for improved accuracy.

Education

Bachelor’s Degree in Management & Economics (Electronic Marketing) at Technological Educational Institute of Crete, Greece
January 11, 2030 - February 4, 2026
Secondary Degree in Financial Services at School of Economics and Administration, Kefalonia, Greece
January 11, 2030 - February 4, 2026
Bachelor’s Degree in Management & Economics (Electronic Marketing) at Technological Educational Institute of Crete, Greece
January 11, 2030 - March 19, 2026
Secondary Degree in Financial Services at School of Economics and Administration, Kefalonia, Greece
January 11, 2030 - March 19, 2026
Bachelor's Degree in Management & Economics (Electronic Marketing) at Technological Educational Institute of Crete, Greece
January 11, 2030 - March 19, 2026
Secondary Degree in Financial Services at School of Economics and Administration, Kefalonia, Greece
January 11, 2030 - March 19, 2026
Bachelor’s Degree in Management & Economics (Electronic Marketing) at Technological Educational Institute of Crete, Greece
January 11, 2030 - March 19, 2026
Secondary Degree in Financial Services at School of Economics and Administration, Kefalonia, Greece
January 11, 2030 - March 19, 2026

Qualifications

ECDL Certified (Microsoft Office)
January 11, 2010 - February 4, 2010
Grow with Google: Increase Creativity with the use of AI
January 1, 2025 - February 4, 2026
Grow with Google: Introduction to Cloud
January 1, 2025 - February 4, 2026
Increase Creativity with the use of AI – Grow with Google
January 1, 2025 - March 19, 2026
Introduction to Cloud – Grow with Google
January 1, 2025 - March 19, 2026
ECDL Certification
January 11, 2010 - March 19, 2010
Increase Creativity with the use of AI – Grow with Google
January 1, 2025 - March 19, 2026
Introduction to Cloud – Grow with Google
January 1, 2025 - March 19, 2026
ECDL Certified (Microsoft Office)
January 11, 2030 - March 19, 2026
Increase Creativity with the Use of AI – Grow with Google
January 1, 2025 - March 19, 2026
Introduction to Cloud – Grow with Google
January 1, 2025 - March 19, 2026

Industry Experience

Financial Services, Professional Services, Education, Media & Entertainment, Software & Internet